Table 4. Demographic and clinical characteristics of study group as a function of median steps per day: ≤ 25th percentile vs. > 75th percentile.
| median steps per day | |||
|---|---|---|---|
| Characteristics | Less than 25th percentile (n = 13) | More than 75th percentile (n = 12) | p value |
| Gestational age at recruitment (weeks) | 26.4 (24.5–29.3) | 25.5 (24.3–29.7) | 0.97 |
| Gestational age at delivery (weeks) | 35.1 (31.6–36.4) | 35.4 (30.0–38.8) | 0.68 |
| Maternal age (years) | 29.0 (27.0–31.5) | 32.0 (27.2–39.2) | 0.15 |
| Pregestational BMI (kg/m2) | 20.8 (18.1–25.8) | 21.4 (18.4–25.0) | 1.00 |
| BMI at recruitment (kg/m2) | 23.7 (21.6–28.3) | 26.5 (24.5–29.9) | 0.19 |
| Gravidity | 2.0 (1.0–2.5) | 2 (1.0–4.0) | 0.53 |
| Parity | 0 (1.0–1.5) | 0 (1.0–2.0) | 0.89 |
| Nulliparous, n (%) | 6 (46.2) | 4 (33.3) | 0.80 |
| Sonographic cervical length (mm) | 12.0 (9.0–12.5) | 10.5 (5.0–15.7) | 0.89 |
| Cervical dilatation (cm) | 0 (0–1.0) | 0 (0–1.0) | 0.93 |
| Days of activity measurement | 17.0 (11.0–21.0) | 15.0 (13.0–21.0) | 0.81 |
| Singleton, n (%) | 7 (53.8) | 6 (50.0) | 1.00 |
| History of preterm birth, n (%) | 2 (15.3) | 1 (8.3) | 1.00 |
| Cerclage, n (%) | 2 (15.3) | 1 (8.3) | 1.00 |
Data are presented as median and interquartile range (IQR). BMI—Body Mass Index.